Photo-catalyst ozone detector

Inactive Publication Date: 2009-08-20
U CAN DYNATEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The main objective of the present invention is to provide an improved photo-catalyst ozone

Problems solved by technology

However, the resistance of the photo-catalyst coating is always over KΩ such that the resistances of the positive electrode, the negative electrode and the conducting portions are next to nothing relative to that of the photo-catalyst coating.

Method used

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  • Photo-catalyst ozone detector

Examples

Experimental program
Comparison scheme
Effect test

experiment 1

[0027]FIG. 3 shows the positive correlation between the impedance response and the consistency of the ozone, and FIG. 4 shows the relation analysis between the consistency of the ozone and the response time. The mass flow controllers (43) are respectively operated to mix the ozone in mix chamber (44) to the following consistencies: 0.5 ppm, 1.02 ppm, 1.64 ppm, 2.04 ppm and 2.5 ppm. The various mixed gases with different consistencies are previously and respectively prepared for detecting and recording.

[0028]The gases with different consistencies are sequentially and respectively guided into the mix chamber (44), and reacted with the photo-catalyst coating (12) of the photo-catalyst ozone detector (1) in accordance with the present invention. The processing device (30) respectively calculates the resistance variation of the photo-catalyst coating (12) and the calculating results are shown in FIG. 3. The impedance responses respectively are 268.28 KΩ, 520.63 KΩ, 784.13 KΩ, 926.98 KΩ a...

experiment 2

of the Resistance Value when the Ozone Consistency is 2.5 ppm:

[0031]The detecting gas with 2.5 ppm ozone is previously mixed in the mix chamber (44) by controlling the two mass flow controllers 43. The impedance response of the photo-catalyst ozone detector (1) of the present invention is recorded by the processing device (30) at a fixed time.

[0032]As shown in FIG. 5, the X-axis is the record times at a fixed time and the Y-axis is the resistance value. At the beginning, the resistance value is quickly raised after the photo-catalyst coating (12) reacting with the ozone when the ozone consistency is 2.5 ppm. The resistance value is slightly undulated after being raised about 1066 KΩ near the maximum thereof. The ultraviolet emitter (46) is operated to illuminate the base (10) for restoring the photo-catalyst coating (12), then the resistance value is quickly reduced near the minimum and the first cycle is finished. The illuminated photo-catalyst coating (12) reacts with the ozone ag...

experiment 3

of the Impedance when the Ozone Consistency is 2.0 ppm:

[0033]The detecting gas with 2.5 ppm ozone is previously mixed in the mix chamber (44) by controlling the two mass flow controllers 43. The impedance response of the photo-catalyst ozone detector (1) of the present invention is recorded by the processing device (30) at a fixed time.

[0034]As shown in FIG. 6, the X-axis is the record times at a fixed time and the Y-axis is the resistance value. At the beginning, the resistance value is quickly raised after the photo-catalyst coating (12) reacting with the ozone. However, the raised ratio is slightly slower than that in the experiment 2 because the ozone consistency is thinner than that in the experiment 2. Accordingly, the experiment result in experiment 1 is proved. The resistance value is slightly undulated after being raised about 888 KΩ near the maximum thereof. The ultraviolet emitter (46) is operated to illuminate the base (10) for restoring the photo-catalyst coating (12), ...

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Abstract

A photo-catalyst ozone detector includes a base. A positive electrode and a negative electrode are respectively disposed on the base. A photo-catalyst coating is disposed on the base for connecting the positive electrode and the negative electrode, and reacting with the ozone to detect ozone consistency, wherein the photo-catalyst coating contains titanium dioxide.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an ozone detector, and more particularly to a photo-catalyst ozone detector that has a photo-catalysis coating containing titanium dioxide.[0003]2. Description of Related Art[0004]As well known, the atmosphere contains oxygen, nitrogen and some rare gas, wherein one of the rare gases (ozone) is concerned about the present invention. The ozone is an intense oxidizer that can eliminate virus, bacteria, spores and fungus such that the ozone can be used for air purification.[0005]The ozone provides the above effects and is not harmful to human body under a specific consistency. However, the ozone is harmful to the human body and the environment when it has a high consistency such that the control of the consistency of the ozone is very importance. As a result, some ozone detectors are patented and marketed.[0006]As regard to EP1219957—ELECTRONIC TONGUE AS OZONE DETECTOR by Ekberg, the electr...

Claims

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Application Information

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IPC IPC(8): G01N27/407
CPCG01N33/0039G01N27/125Y02A50/20
InventorHUANG, FENG-TSUN
OwnerU CAN DYNATEX